
#and
num = 18
if  0 < num < 100:   # 或 if age > 0 and age < 100:
    print("输入正确")
else:
    print("输入错误")

#or
python_score = 80
c_score = 30
if python_score >= 60 or c_score >= 60:
    print("成绩合格")


#not
age = 19
if not (age < 18):
    print("已成年")
else:
    print("未成年")


# not 构成条件
# 定义变量(True表示本公司员工)
employer = True
# if not employer:
if not (employer is False):
    print("本公司员工")
else:
    print("非本公司员工")


















